CN115282489B - Magnetic stimulation devices and magnetic stimulation equipment - Google Patents

Abstract

The invention provides a magnetic stimulation device and magnetic stimulation equipment, relates to the field of biomedical technology, and solves the problem of the heavy weight of the magnetic stimulation device. The magnetic stimulation device includes two spaced apart first cylindrical magnetic cores and coils. The coils are respectively wound around the outer circumferences of the two first cylindrical magnetic cores; wherein, the coils are used to generate a magnetic field when current passes through; the first The cylindrical magnetic core is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field, thereby achieving the purpose of reducing the weight of the magnetic stimulation device while providing sufficient magnetic stimulation intensity.

Description

Magnetic stimulation devices and magnetic stimulation equipment

Technical field

The invention relates to the field of biomedical technology, and in particular to a magnetic stimulation device and magnetic stimulation equipment.

Background technique

Transcranial Magnetic Stimulation (TMS) is a stimulation technology that allows powerful alternating magnetic fields to pass through the skull and induce current in the cerebral cortex to stimulate brain nerves.

In the prior art, a magnetic stimulation device is usually used to achieve transcranial magnetic stimulation. The magnetic stimulation device includes a "C"-shaped magnetic core and a coil wound around the "C"-shaped magnetic core. When the coil is energized, a current flows through it to generate a magnetic field. The "C"-shaped magnetic core can further strengthen the magnetic field, and the strengthened magnetic field can be used to perform transcranial magnetic stimulation.

Although the "C" type magnetic core can increase the intensity of magnetic stimulation to a great extent, there will be a problem of easy saturation of the magnetic core. In order to avoid magnetic core saturation, it is usually necessary to set the cross-sectional area of the "C"-shaped magnetic core to be large enough, and the magnetic path length of the "C"-shaped magnetic core to be longer. However, this will result in a larger weight of the magnetic stimulation device.

Contents of the invention

The invention provides a magnetic stimulation device and magnetic stimulation equipment, which reduce the weight of the magnetic stimulation device while providing sufficient magnetic stimulation intensity.

The invention provides a magnetic stimulation device, including:

Two spaced apart first cylindrical magnetic cores and coils, the coils are respectively wound around the outer peripheries of the two first cylindrical magnetic cores.

Wherein, the coil is used to generate a magnetic field when current passes through it.

The first cylindrical magnetic core is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field.

According to a magnetic stimulation device provided by the present invention, the coil is wound around the middle part of the first cylindrical magnetic core, and both ends of the first cylindrical magnetic core are exposed to the outside of the coil.

According to the magnetic stimulation device provided by the present invention, a through hole is provided in the interior of the first cylindrical magnetic core along the axial direction.

According to a magnetic stimulation device provided by the present invention, the magnetic stimulation device further includes a second cylindrical magnetic core respectively arranged on the top of the two first cylindrical magnetic cores, the first cylindrical magnetic core and the The second cylindrical magnetic core is arranged coaxially, and the diameter of the second cylindrical magnetic core is larger than the diameter of the first cylindrical magnetic core.

According to a magnetic stimulation device provided by the present invention, the first cylindrical magnetic core and the second cylindrical magnetic core are both provided with through holes in the axial direction, and the top end of the first cylindrical magnetic core is provided with in the through hole of the second cylindrical core.

According to a magnetic stimulation device provided by the present invention, the second cylindrical magnetic core has a recess on a side facing away from the first cylindrical magnetic core, and the first cylindrical magnetic core faces away from the second cylindrical magnetic core. A convex portion is formed on one side of the core.

According to a magnetic stimulation device provided by the present invention, the axes of the two first cylindrical magnetic cores form a predetermined angle, and the side of the two first cylindrical magnetic cores facing the target object is in contact with the target object. The stimulation site of the target object is tangential, and the second cylindrical magnetic core is located on a side of the first cylindrical core away from the stimulation site.

According to a magnetic stimulation device provided by the present invention, the coil is wound in a single layer in the axial direction of the two first cylindrical magnetic cores and in a multi-layer winding in the radial direction, and the two wire ends of the coil are wound from the tight side respectively. The inner ring of the circular coil attached to the first cylindrical magnetic core is drawn out.

Wherein, the current directions in the two circular coils wound around the two first cylindrical cores are opposite.

According to a magnetic stimulation device provided by the present invention, the coil is wound in multiple layers in the axial direction of the two first cylindrical magnetic cores and multiple layers in the radial direction; when the multiple layers are wound in the axial direction, it is an odd number of layers. When , the two wire ends of the coil are respectively drawn out from the inner ring of the circular coil away from the first cylindrical core; when the multi-layer winding in the axial direction becomes an even number of layers, the two wire heads of the coil are respectively drawn out from the inner ring of the circular coil away from the first cylindrical core The outer ring of the circular coil is led away from the first cylindrical magnetic core.

Wherein, the current directions in the two circular coils wound around the two first cylindrical cores are opposite.

The present invention also provides a magnetic stimulation device, including: a shell, and a magnetic stimulation device disposed in the shell; wherein the magnetic stimulation device is any one of the above magnetic stimulation devices.

The invention provides a magnetic stimulation device and magnetic stimulation equipment. The magnetic stimulation device includes two first cylindrical magnetic cores arranged at intervals and coils. The coils are respectively wound around the outer peripheries of the two first cylindrical magnetic cores. Among them, the coil is used to generate a magnetic field when current flows through it; the first cylindrical magnetic core is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field. In this way, the stimulation intensity required for magnetic stimulation can be effectively provided through the cylindrical magnetic core arranged in the center of the coil, and the magnetic circuit of the first cylindrical core is short, thereby achieving sufficient magnetic stimulation intensity. , with the purpose of reducing the weight of the magnetic stimulation device.

Description of the drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are the drawings of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of an application scenario provided by the present invention;

Figure 2 is a schematic diagram of the magnetic field distribution of the coil provided by the present invention;

Figure 3 is a schematic front structural view of the magnetic stimulation device provided by the present invention;

Figure 4 is a top structural schematic diagram of the magnetic stimulation device provided by the present invention;

Figure 5 is a schematic structural view of the coil provided by the present invention wound around the middle part and the lower end of the first cylindrical core, with the upper end exposed outside the coil;

Figure 6 is a schematic diagram of magnetic stimulation intensity provided by the present invention;

Figure 7 is a schematic front structural view of the first cylindrical magnetic core and the second cylindrical magnetic core provided by the present invention;

Figure 8 is a schematic top structural view of the first cylindrical magnetic core and the second cylindrical magnetic core provided by the present invention;

Figure 9 is a schematic bottom structural diagram of the first cylindrical magnetic core and the second cylindrical magnetic core provided by the present invention;

Figure 10 is a schematic diagram 2 of the magnetic stimulation intensity provided by the present invention;

Figure 11 is a top structural schematic diagram of the first cylindrical magnetic core and the second cylindrical magnetic core provided with through holes provided by the present invention;

Figure 12 is a schematic bottom structural view of the first cylindrical magnetic core and the second cylindrical magnetic core provided with through holes provided by the present invention;

Figure 13 is a schematic front structural view of a magnetic stimulation device provided with concave portions and convex portions provided by the present invention;

Figure 14 is a schematic diagram of the relationship between the magnetic stimulation device and the stimulation site provided by the present invention;

Figure 15 is a schematic diagram three of the magnetic stimulation intensity provided by the present invention.

Reference signs:

30: Magnetic stimulation device; 301: First cylindrical magnetic core; 302: Coil; 303: Second cylindrical magnetic core.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

In the embodiment of the present invention, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the text description of the present invention, the character "/" generally indicates that the related objects are in an "or" relationship.

Transcranial magnetic stimulation technology is a stimulation technology that allows a powerful alternating magnetic field to pass through the skull and induce current in the cerebral cortex to stimulate cerebral nerves. It can be used not only for transcranial nerve regulation, but also for stimulation of peripheral nerves and muscles. It has been used in various aspects such as neuropsychology, rehabilitation, and pediatrics.

For example, see Figure 1 , which is a schematic diagram of an application scenario provided by the present invention. In a transcranial magnetic stimulation scenario, it includes a magnetic stimulation device and a pulse power supply for powering the magnetic stimulation device. Among them, the magnetic stimulation device shown in Figure 1 only includes a coil. When the magnetic stimulation device is energized, a current passes through the coil to generate a magnetic field, thereby performing transcranial magnetic stimulation through the magnetic field.

However, since the instantaneous current flowing through the coil reaches more than thousands of amperes, the pulse width of a single pulse is about 350us, the repetitive stimulation frequency can reach 100Hz, and the energy consumption of a single stimulation pulse ranges from tens to hundreds of joules, making the final Less energy is consumed at the transcranial magnetic stimulation site, and most of the energy is dissipated in the form of heat on coils, wires, and circuits; air cooling and water cooling are required to dissipate heat from the coils during the magnetic stimulation process.

In order to solve the above-mentioned problems of magnetic stimulation devices that only include coils, in the prior art, magnetic stimulation devices that include a “C”-shaped magnetic core and coils wound around the “C”-shaped magnetic core are usually used for transcranial magnetic stimulation. . Although the "C" type magnetic core can increase the intensity of magnetic stimulation to a great extent, there will be a problem of easy saturation of the magnetic core. In order to avoid saturation of the C-shaped magnetic core, it is usually necessary to set the cross-sectional area of the "C"-shaped magnetic core to be large enough, and the magnetic circuit length of the "C"-shaped magnetic core is longer. However, this will result in a heavier weight of the magnetic stimulation device. .

In order to reduce the weight of the magnetic stimulation device while providing sufficient magnetic stimulation intensity, observe the magnetic field distribution of the coil. For an example, see Figure 2. Figure 2 is a schematic diagram of the magnetic field distribution of the coil provided by the present invention. As can be seen from Figure 2, the densest part of the magnetic field is the inner diameter part of the coil. The inner diameter part of the coil has the largest magnetic resistance. On both sides of the coil, the magnetic field space is larger and the equivalent magnetic resistance is smaller. Therefore, if a The cylindrical magnetic core can greatly increase the magnetic stimulation intensity, and compared with the "C" type magnetic core, the weight of the magnetic stimulation device is reduced.

Based on the above technical concept, the present invention provides a magnetic stimulation device. Below, the magnetic stimulation device provided by the present invention will be described in detail through specific embodiments. It can be understood that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

Figure 3 is a schematic front structural view of the magnetic stimulation device 30 provided by the present invention. For an example, see Figure 3. The magnetic stimulation device 30 may include:

There are two spaced apart first cylindrical magnetic cores 301 and coils 302. The coils 302 are respectively wound around the outer peripheries of the two first cylindrical magnetic cores 301.

Among them, the coil 302 is used to generate a magnetic field when current flows through it.

The first cylindrical magnetic core 301 is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field.

For ease of understanding, reference may be made to FIG. 4 , which is a top structural schematic diagram of the magnetic stimulation device 30 provided by the present invention. It can be seen that the magnetic stimulation device 30 includes two spaced apart first cylindrical magnetic cores 301 and The coil 302 is wound around the outer periphery of the two first cylindrical magnetic cores 301 respectively.

For example, the height of the first cylindrical magnetic core 301 can be any value in the range of 0.5cm-5cm, and the diameter of the first cylindrical magnetic core 301 can be any value in the range of 4cm-7cm. Specifically, Set according to actual needs.

Taking the height of the first cylindrical magnetic core 301 as 1cm and the diameter as 5cm as an example, the magnetic field generated by the coil 302 is strengthened by the first cylindrical magnetic core 301. After software simulation experiments, it can be concluded that compared with The magnetic stimulation intensity provided by the coil 302 is 0.27T, and the magnetic stimulation intensity about 2cm below the coil 302 can be increased to 0.33T, and the weight of the first cylindrical magnetic core 301 is only 300g, compared with the "C" type magnetic core , effectively reducing the weight of the magnetic stimulation device 30.

Taking the height of the first cylindrical magnetic core 301 as 2cm and the diameter as 5cm as an example, the magnetic field generated by the coil 302 is strengthened by the first cylindrical magnetic core 301. After software simulation experiments, it can be concluded that compared with The magnetic stimulation intensity provided by the coil 302 is 0.27T, and the magnetic stimulation intensity about 2cm below the coil 302 can be increased to 0.39T, and the weight of the first cylindrical magnetic core 301 is only 600g, compared with the "C" type magnetic core , effectively reducing the weight of the magnetic stimulation device 30.

Combining the above two examples, it is easy to see that the greater the height of the first cylindrical magnetic core 301, the stronger the corresponding magnetic stimulation intensity provided, that is, the height of the first cylindrical magnetic core 301 is directly proportional to the magnetic stimulation intensity provided by it. . However, the height of the first cylindrical magnetic core 301 should not be too large, because if the height is too large, the weight of the magnetic stimulation device 30 will be increased, thereby failing to achieve the purpose of reducing the weight.

For example, in the embodiment of the present invention, the first cylindrical magnetic core 301 can be made of highly saturated magnetic powder material and pressed through a customized mold, which has better magnetic permeability and magnetic saturation performance; it can also be made of epoxy resin. , high-temperature paraffin and other adhesives are mixed with magnetic powder and then poured into molding; it can also be combined and fixed with standard ring-shaped cores and cylindrical cores on the market through sockets. The fixing method can be epoxy resin, which can be used in epoxy Magnetic powder is added to the resin to increase the magnetic permeability in the gap, which can be set according to actual needs.

It can be seen that the magnetic stimulation device 30 provided by the present invention includes two spaced apart first cylindrical magnetic cores 301 and coils 302. The coils 302 are respectively wound around the outer peripheries of the two first cylindrical magnetic cores 301. Among them, the coil 302 is used to generate a magnetic field when current passes through it; the first cylindrical magnetic core 301 is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field. In this way, the cylindrical magnetic core disposed at the center of the coil 302 can effectively provide the stimulation intensity required for magnetic stimulation, thereby reducing the weight of the magnetic stimulation device 30 while providing sufficient magnetic stimulation intensity.

Based on the above embodiment shown in FIG. 3 , when the coils 302 in the magnetic stimulation device 30 are respectively wound around the outer circumferences of the two first cylindrical magnetic cores 301 , the entire outer circumference of the first cylindrical magnetic core 301 can be wound around, or only the outer circumferences of the first cylindrical magnetic cores 301 can be wound around. Wrap part of the outer periphery of the first cylindrical magnetic core 301, and the details can be set according to actual needs.

In one possible scenario, in order to reduce the ineffective magnetic field energy at the upper end of the first cylindrical magnetic core 301 and guide the magnetic field closer to the magnetic stimulation site, for example, in the embodiment of the present invention, the coil 302 can be wound around the first cylinder. In the middle part of the first cylindrical magnetic core 301, both ends of the first cylindrical magnetic core 301 are exposed to the outside of the coil 302, as shown in FIG. outside, the ineffective magnetic field energy at the upper end of the first cylindrical magnetic core 301 can be reduced, and the magnetic field can be guided closer to the magnetic stimulation site.

In this possible scenario, when the coil 302 is wound around the middle of the first cylindrical core 301 and the two ends of the first cylindrical core 301 are exposed to the outside of the coil 302, the first cylindrical core 301 The greater the height, the stronger the corresponding magnetic stimulation intensity provided.

Of course, when the coil 302 is wound around the outer circumferences of the two first cylindrical cores 301, the coil 302 can also be wound around the middle part and one end of the first cylindrical core 301, and the other end is exposed outside the coil 302. . For example, the coil 302 can be wound around the middle part and the upper end of the first cylindrical magnetic core 301, and the lower end of the first cylindrical magnetic core 301 is exposed to the outside of the coil 302, which can guide the magnetic field closer to the magnetic stimulation site; or, the coil 302 can Wound around the middle part and lower end of the first cylindrical magnetic core 301, the upper end of the first cylindrical magnetic core 301 is exposed to the outside of the coil 302. For an example, see the figure below. Figure 5 shows the winding of the coil 302 provided by the present invention. In the middle part and lower end of the first cylindrical magnetic core 301, the upper end is exposed to the outside of the coil 302. This can reduce the ineffective magnetic field energy at the upper end of the first cylindrical magnetic core 301; correspondingly, the magnetic field shown in Figure 5 The stimulation device 30 can be seen in Figure 6. Figure 6 is a schematic diagram of the magnetic stimulation intensity provided by the present invention.

In one possible scenario, based on the above-mentioned embodiment shown in Figure 3, based on the magnetic stimulation device 30 provided by the embodiment shown in Figure 3, in order to further reduce the weight of the magnetic stimulation device 30, by observing the magnetic induction intensity It is found from the distribution that the magnetic induction intensity in the central part of the first cylindrical magnetic core 301 is weak. Without causing saturation of the magnetic core, the central material of the first cylindrical magnetic core 301 can be removed, so that the first cylindrical magnetic core 301 A through hole is provided in the interior along the axial direction to form a ring-cylindrical magnetic core, thereby achieving the purpose of reducing the weight of the magnetic stimulation device 30 by providing a ring-cylindrical magnetic core with through holes.

For example, when a through hole is provided along the axial direction inside the first cylindrical core 301, the diameter of the through hole can be any value within the range of 1cm-2cm, as long as it is smaller than the diameter of the first cylindrical core 301. , which can be set according to actual needs.

In a possible scenario, based on the above-mentioned embodiment shown in FIG. 3 , based on the magnetic stimulation device 30 provided in the embodiment shown in FIG. 3 , in order to further improve the stimulation intensity of the magnetic stimulation device 30 , the magnetic resistance is reduced. , a second cylindrical magnetic core 303 is provided on the top of the two first cylindrical magnetic cores 301, that is, a second cylindrical magnetic core is provided on the top of each cylindrical magnetic core, the first cylindrical magnetic core 301 and The second cylindrical magnetic core 303 is arranged coaxially, and the diameter of the second cylindrical magnetic core 303 is larger than the diameter of the first cylindrical magnetic core 301 . For example, please refer to FIG. 7 , which is a schematic front structural view of the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 provided by the present invention. It can be seen from FIG. 7 that the first cylindrical magnetic core 303 The magnetic core 301 and the second cylindrical magnetic core 303 form a "T" shaped double cylindrical magnetic core. It can be understood that the coil 302 is not wound around the second cylindrical core 303 .

For example, the height of the second cylindrical magnetic core 303 can be any value in the range of 0.5cm-3cm, the diameter of the second cylindrical magnetic core 303 can be any value in the range of 2cm-5cm, and the third The diameter of the second cylindrical magnetic core 303 is larger than the diameter of the first cylindrical magnetic core 301, and can be set according to actual needs.

It should be noted that in the embodiment of the present invention, the “T”-shaped double cylindrical core composed of the first cylindrical core 301 and the second cylindrical core 303 can be two cylindrical cores produced separately. , a "T"-shaped double cylindrical magnetic core is obtained through a combination process; it can also be a "T"-shaped double cylindrical magnetic core produced by integrated molding, which can be set according to actual needs. Here, the embodiment of the present invention does not Specific restrictions.

For ease of understanding, FIG. 8 and FIG. 9 can be combined. FIG. 8 is a top structural schematic diagram including a first cylindrical core 301 and a second cylindrical core 303 provided by the present invention. FIG. 9 is a schematic diagram of the structure provided by the present invention. A schematic bottom view of the structure including the first cylindrical core 301 and the second cylindrical core 303. It can be seen from Figure 8 and Figure 9 that the tops of the two first cylindrical cores 301 in the magnetic stimulation device 30 are arranged There is a second cylindrical magnetic core 303. The first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 are arranged coaxially, and the diameter of the second cylindrical magnetic core 303 is larger than the diameter of the first cylindrical magnetic core 301.

Combined with the magnetic stimulation device 30 shown in Figure 7, by disposing the second cylindrical magnetic core 303 on the top of the two first cylindrical magnetic cores 301, the magnetic stimulation intensity provided by the corresponding magnetic stimulation device 30 is higher than that provided by the coil. The magnetic stimulation intensity provided by 302 can be increased from 0.27T (hollow) to 0.46T at about 2cm below the coil 302. Since the volume of the magnetic core does not increase much, the weight increase is within the acceptable range.

For example, in this possible scenario, when the coil 302 in the "T"-shaped double cylindrical core is only wound around the middle part and the lower end of the first cylindrical core 301, and the upper end is exposed to the outside of the coil 302, the corresponding The magnetic stimulation intensity can be seen in Figure 10. Figure 10 is a schematic diagram of the magnetic stimulation intensity provided by the present invention. Compared with the magnetic stimulation intensity shown in Figure 6, the magnetic stimulation intensity is significantly enhanced.

In one possible scenario, for example, combined with the magnetic stimulation device 30 shown in Figure 7, in order to further reduce the weight of the magnetic stimulation device 30, it is found by observing the magnetic induction intensity distribution that the central part of the first cylindrical magnetic core 301 is magnetically induced. The strength is weak. Without causing core saturation, the central material of the first cylindrical core 301 and the second cylindrical core 303 can be removed, so that the first cylindrical core 301 and the second cylindrical core The interior of the core 303 is provided with through holes along the axial direction, and the top end of the first cylindrical magnetic core 301 is disposed in the through hole of the second cylindrical magnetic core 303 . For example, please refer to Figures 11 and 12. Figure 11 is a top structural schematic diagram of the first cylindrical core 301 and the second cylindrical core 303 provided with through holes provided by the present invention. Figure 12 is a schematic diagram of the structure of The invention provides a schematic bottom structural diagram of the first cylindrical core 301 and the second cylindrical core 303 provided with through holes. It can be seen from Figure 11 and Figure 12 that the first cylindrical core 301 and the second cylindrical core 301 are The interior of the cylindrical magnetic core 303 is provided with through holes along the axial direction. The top end of the first cylindrical magnetic core 301 is arranged in the through hole of the second cylindrical magnetic core 303. Through the ring-cylindrical magnetic core provided with the through holes, The purpose of reducing the weight of the magnetic stimulation device 30 can be effectively achieved.

In this possible scenario, for example, the diameter of the through hole of the second cylindrical core 303 may be approximately equal to the diameter of the first cylindrical core 301, so that the top end of the first cylindrical core 301 may be disposed at the inside the through holes of the two cylindrical magnetic cores 303. For example, the diameter of the through hole of the first cylindrical magnetic core 301 can be any value in the range of 1cm-2cm, as long as it is smaller than the diameter of the first cylindrical magnetic core 301. The through hole provided in the second cylindrical magnetic core 303 The diameter of can be determined according to the diameter of the through hole of the first cylindrical magnetic core 301, as long as it is smaller than the diameter of the second cylindrical magnetic core 303, and can be set according to actual needs.

In one possible scenario, for example, combined with the magnetic stimulation device 30 shown in FIG. 7 , considering that the magnetic induction intensity of the central part of the side of the second cylindrical magnetic core 303 away from the first cylindrical magnetic core 301 is weak, it is not possible to Therefore, in order to further reduce weight, the core in the central part can be dug out, so that the side of the second cylindrical core 303 away from the first cylindrical core 301 has a recess, which can It is a frustum-shaped recess; in addition, in order to guide the magnetic field close to the stimulated part, thereby increasing the stimulation intensity, the dug frustum can be moved to the side of the first cylindrical magnetic core 301 away from the second cylindrical magnetic core 303. A convex part is formed on the side of the first cylindrical magnetic core 301 away from the second cylindrical magnetic core 303, and the concave part and the convex part are coupled to each other. For example, please refer to Figure 13, which is a schematic front structural view of the magnetic stimulation device 30 provided with concave parts and convex parts provided by the present invention. It can be seen from Figure 13 that the second cylindrical magnetic core 303 is away from the first A cylindrical magnetic core 301 has a concave portion on one side, and a convex portion is formed on the side of the first cylindrical magnetic core 301 away from the second cylindrical magnetic core 303 .

Assuming that the magnetic stimulation intensity about 2cm below the coil 302 of the magnetic stimulation device 30 shown in Figure 7 is 0.37T, by setting a recess on one side of the second cylindrical magnetic core 303 and a recess on one side of the first cylindrical magnetic core 301 There are convex parts. For example, the concave parts and the convex parts can be coupled to each other. See the magnetic stimulation device 30 shown in Figure 13. The magnetic stimulation intensity about 2cm below the coil 302 is 0.45T.

In a possible scenario, for example, combined with the magnetic stimulation device 30 shown in Figure 7, when performing magnetic stimulation on the stimulation part, since the magnetic stimulation part is arc-shaped, the two first cylindrical magnetic cores 301 The axes are on the same horizontal line, which not only makes the magnetic stimulation device 30 larger in size, but also cannot fit the stimulation site well, thus affecting the intensity and depth of the magnetic stimulation. In order to reduce the volume of the magnetic stimulation device 30 and enable the magnetic stimulation device 30 to fit better to the stimulation site, the two first cylindrical magnetic cores 301 can be bent inward, so that the two first cylindrical magnetic cores 301 The axes of the two first cylindrical magnetic cores 301 form a predetermined angle, and the side of the two first cylindrical magnetic cores 301 facing the target object is tangent to the stimulation site of the target object, and the second cylindrical magnetic core 303 is located at the first cylindrical magnetic core 301 away from the stimulation site. one side, thus forming a biconical magnetic stimulus. For example, see Figure 14, which is a schematic diagram of the relationship between the magnetic stimulation device 30 and the stimulation site provided by the present invention. Although part of the focus is sacrificed, the height of the magnetic stimulation device 30 can be reduced, so that the magnetic stimulation device 30 It can fit well with the stimulation site, thus effectively increasing the intensity and depth of magnetic stimulation.

The value of the predetermined included angle can be set according to actual needs. Here, the embodiment of the present invention does not impose specific restrictions on the value of the predetermined included angle.

For example, in this possible scenario, when the coil 302 in the magnetic stimulation device 30 shown in Figure 14 is only wound around the middle part and the lower end of the first cylindrical core 301, and the upper end is exposed to the outside of the coil 302, The corresponding magnetic stimulation intensity can be seen in Figure 15. Figure 15 is the third schematic diagram of the magnetic stimulation intensity provided by the present invention. Compared with the magnetic stimulation intensity shown in Figure 10, the magnetic stimulation intensity is significantly enhanced.

Based on any of the above possible scenarios, for the magnetic stimulation device 30 shown in any of the possible scenarios, when the coil 302 is wound around the outer periphery of the two first cylindrical magnetic cores 301, it may include at least two of the following: Possible winding methods, among the two winding methods, the two first cylindrical magnetic cores 301 both share a coil 302.

In one possible winding method, a single-layer disk-shaped figure-8 coil 302 can be wound around the outer periphery of two first cylindrical magnetic cores 301. Specifically, the coil 302 is wound around the two first cylindrical magnetic cores 301. The magnetic core 301 is wound in a single layer in the axial direction and in multiple layers in the radial direction, and the two wire ends of the coil 302 are respectively drawn from the inner ring of the circular coil 302 close to the first cylindrical core 301; wherein, two wire ends are wound. The current directions in the two circular coils 302 of a cylindrical magnetic core 301 are opposite.

In this possible winding method, each circular coil 302 of the figure-8 coil 302 includes a layer of disk-shaped coils 302. The coils 302 can be wound using flat copper wires or Litz wires. Under the same AC resistance, , the Litz wire is lighter, which is more conducive to reducing the weight of the magnetic stimulation device 30 . In addition, in order to reduce the resistance loss of the coil 302, it is necessary to increase the cross-sectional area of the wire as much as possible to reduce the AC resistance, which can make wider and thinner flat copper wires or rectangular Litz wires, and use wider and thinner flat copper wires or rectangular Litz wires. Multi-layer winding is achieved in the radial direction of the two first cylindrical cores 301 .

In another possible winding method, a double-layer disk-shaped figure-8 coil 302 can be wound around the outer periphery of the two first cylindrical magnetic cores 301, specifically: the coil 302 is wound around the two first cylindrical cores 301. The magnetic core 301 is multi-layered in the axial direction and multi-layered in the radial direction; when the multi-layered winding in the axial direction is an odd number of layers, the two wire ends of the coil are respectively separated from the circular coil of the first cylindrical core 301 The inner ring is led out; when the multi-layer winding in the axial direction is an even-numbered layer winding, the two wire ends of the coil are respectively led out from the outer ring of the circular coil away from the first cylindrical core 301 . Wherein, the current directions in the two circular coils wound around the two first cylindrical cores 301 are opposite.

In this possible winding method, each circular coil 302 of the figure-8 coil 302 includes at least two layers of disc-shaped coils 302 and are connected at the inner ring. The two circular coils 302 are tangent to the outer ring. connected to form a double-layer disk-shaped figure-8 coil 302. Compared with the single-layer disk-shaped figure-8 coil 302, the double-layer coil 302 has fewer turns per layer. The use of thicker wires and low-cost circular Litz wires can effectively reduce the loss of the coil 302; at the same time, the coil 302 The lead wires are all led out from the outer ring of the coil 302, which not only does not increase the thickness of the coil 302, but also makes wiring more convenient.

The present invention also provides a magnetic stimulation device. As an example, the magnetic stimulation device may include: a shell and a magnetic stimulation device disposed in the shell; wherein the magnetic stimulation device is the magnetic stimulation device shown in any of the above embodiments. The implementation principle and beneficial effects of the device are similar to those of the magnetic stimulation device. Please refer to the implementation principle and beneficial effects of the magnetic stimulation device, which will not be described again here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A magnetic stimulation device, characterized in that it includes: Two spaced apart first cylindrical magnetic cores and coils, the coils being respectively wound around the outer peripheries of the two first cylindrical magnetic cores; Wherein, the coil is used to generate a magnetic field when current passes through; The first cylindrical magnetic core is used to strengthen the magnetic field to stimulate the target object through the strengthened magnetic field; The magnetic stimulation device also includes a second cylindrical magnetic core respectively arranged on the top of the two first cylindrical magnetic cores. The first cylindrical magnetic core and the second cylindrical magnetic core are arranged coaxially. , and the diameter of the second cylindrical core is larger than the diameter of the first cylindrical core. 2. The magnetic stimulation device according to claim 1, characterized in that, The coil is wound around the middle part of the first cylindrical magnetic core, and both ends of the first cylindrical magnetic core are exposed to the outside of the coil. 3. The magnetic stimulation device according to claim 1 or 2, characterized in that, A through hole is provided in the interior of the first cylindrical magnetic core along the axial direction. 4. The magnetic stimulation device according to claim 1, characterized in that, The first cylindrical magnetic core and the second cylindrical magnetic core are both provided with through holes in the axial direction, and the top end of the first cylindrical magnetic core is disposed at the through hole of the second cylindrical magnetic core. inside the hole. 5. The magnetic stimulation device according to claim 1, characterized in that, The second cylindrical magnetic core has a concave portion on a side facing away from the first cylindrical magnetic core, and a convex portion is formed on a side of the first cylindrical magnetic core facing away from the second cylindrical magnetic core. 6. The magnetic stimulation device according to claim 1, characterized in that, The axes of the two first cylindrical magnetic cores form a predetermined angle, and the side of the two first cylindrical magnetic cores facing the target object is tangent to the stimulation site of the target object. The two cylindrical magnetic cores are located on the side of the first cylindrical magnetic core away from the stimulation site. 7. The magnetic stimulation device according to claim 1 or 2, characterized in that, The coil is wound in a single layer in the axial direction of the two first cylindrical magnetic cores and in multiple layers in the radial direction. The inner ring of the shaped coil is led out; Wherein, the current directions in the two circular coils wound around the two first cylindrical cores are opposite. 8. The magnetic stimulation device according to claim 1 or 2, characterized in that, The coil is wound in multiple layers in the axial direction of the two first cylindrical magnetic cores and in multiple layers in the radial direction; when the multi-layer winding in the axial direction is an odd number of layers, the two wire ends of the coil are wound from The inner ring of the circular coil away from the first cylindrical core is drawn out; when the multi-layer winding in the axial direction is an even-numbered layer winding, the two wire ends of the coil are drawn from the circular coil away from the first cylindrical core. The outer ring of the shaped coil is led out; Wherein, the current directions in the two circular coils wound around the two first cylindrical cores are opposite. 9. A magnetic stimulation device, characterized in that it includes: a shell and a magnetic stimulation device arranged in the shell; wherein the magnetic stimulation device is the magnetic stimulation device according to any one of the above claims 1-8. Stimulation device.